Since the late 1990s, several multidisciplinary summer schools related to wave propagation in complex media have been organized. These schools brought together researchers and students from a wide range of fields such as seismology, acoustics, optics, condensed-matter or atomic physics. They have created many links between the members of these different communities. The Complex2018 summer school pursues the same objectives.

Light traveling through thick clouds, electrons conducting in metals or atomic clouds evolving in random optical environments are all examples of waves propagating through complex media: Throughout its trajectory, the wave encounters many heterogeneities and undergoes multiple scattering. During this process, the phase of the wave is never completely lost or erased, and "mesoscopic" interference phenomena may show up. The mesoscopic physics of waves in complex media is important on a fundamental level because it involves universal wave phenomena like Anderson localization. On a practical level, the theoretical understanding of wave propagation in complex media has allowed great progresses towards the control of waves in these systems: Today, for example, we know how to image hidden objects behind a very heterogeneous medium by exploiting the spatial correlations of the wave-field, or even force a wave to propagate along a desired path by designing properly the propagation medium. At the same time, many researchers are beginning to explore new types of complex media, in which the waves are confined or subject to non-linear effects. In optics, the use of such materials highlights states of light that until now were thought to be reserved to atomic or condensed-matter systems, such as optical superfluids, Bose-Einstein condensates or topological insulators. All these concepts are strongly related, but they are often tackled with theoretical or experimental approaches and different languages. In this context, it is essential to bring together these different visions through lectures given by experienced researchers from these different communities.


Diederik Wiersma (LENS, Florence) - Light diffusion in disordered media

Mathias Fink (ESPCI Paris) - Matrix approach of wave imaging in complex media

Gilles Montambaux (LPS, Univ. Paris-Sud) - Mesoscopic physics

Yan Fyodorov (King's College London) - Random-matrix theory of resonant scattering of waves

Sergey Skipetrov (CNRS, Grenoble) - Anderson localization of classical waves

Dominique Delande (LKB, Paris) - Matter waves in random optical potentials

Juan José Saenz (DIPC, San Sebastian) - Optical forces in complex media

Sylvain Gigan (LKB, Paris) - Optical imaging in complex media

Nicolas Pavloff (LPTMS, Univ. Paris-Sud) - Nonlinear light propagation

Stefan Rotter (Vienna Univ. of Technology) - When mesoscopic physics meets wave control

Fabrice Mortessagne (INPHYNI, Nice) - Waves and topology


Geoffroy Lerosey (Institut Langevin, Paris) 

Claire Michel (INPHYNI, Nice) 

Chia Wei Hsu (Harvard University)

Thibaut Jonkheere (CPT, Marseille)

Thomas Brunet (Université de Bordeaux)

Romolo Savo (ETH Zürich)

Giulia Semeghini (LENS, Florence)

Shakeeb Hasan (University of Twente)

Yvan Sortais (Institut d'Optique, Palaiseau)

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